Affiliation: Department of Gastroenterology and Hepatology, Changi General Hospital, Singapore.

ABSTRACT

Background and study aims: Two 22G needles with similar designs, apart from the absence (A) or presence of a side port (B), are available for endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA). The side port was designed to increase diagnostic yield but this advantage was unproven. This study evaluated the difference in diagnostic yield between both needles in pancreatic masses.

Patients and methods: This was a prospective multicenter randomized cross-over study. Patients with pancreatic masses were randomized to one needle for the first two passes, followed by the other for the next two passes. A pathologist blinded to the needle assessed each puncture for cellularity and morphology. The diagnostic yield between both needles was compared.

Mentions:
The two 22G needles being compared were both manufactured by Olympus (Tokyo, Japan) and were similar in design apart from the absence or presence of a side port, i. e. EZ-Shot 2 (model: NA-220H-8022) and EZ-Shot 2 with side port (NA-230H-8022) (Fig. 1). The needles were packaged with a 20 mL syringe for application of suction. Full suction was used during EUSFNA. Randomization of the needle used for initial puncture was carried in blocks of five with equal assignment. Once the first two punctures had been performed, the alternative needle was used for the subsequent two needle passes.

Mentions:
The two 22G needles being compared were both manufactured by Olympus (Tokyo, Japan) and were similar in design apart from the absence or presence of a side port, i. e. EZ-Shot 2 (model: NA-220H-8022) and EZ-Shot 2 with side port (NA-230H-8022) (Fig. 1). The needles were packaged with a 20 mL syringe for application of suction. Full suction was used during EUSFNA. Randomization of the needle used for initial puncture was carried in blocks of five with equal assignment. Once the first two punctures had been performed, the alternative needle was used for the subsequent two needle passes.

Affiliation:
Department of Gastroenterology and Hepatology, Changi General Hospital, Singapore.

ABSTRACT

Background and study aims: Two 22G needles with similar designs, apart from the absence (A) or presence of a side port (B), are available for endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA). The side port was designed to increase diagnostic yield but this advantage was unproven. This study evaluated the difference in diagnostic yield between both needles in pancreatic masses.

Patients and methods: This was a prospective multicenter randomized cross-over study. Patients with pancreatic masses were randomized to one needle for the first two passes, followed by the other for the next two passes. A pathologist blinded to the needle assessed each puncture for cellularity and morphology. The diagnostic yield between both needles was compared.